Abstract
Four cases of Trichophyton violaceum infection were reported. They were a 7-year-old boy with kerion celsi and “black dot ringworm” on the parietal and frontal regions, a 4-year-old girl, a sister of the first patient, with tinea corporis on the face, a 10-year-old boy with “black dot ringworm” on the left side of the occipital region and an 11-year-old girl with “black dot ringworm” on the parietal region. All organisms isolated from these four cases were determined to be T. violaceum, by cultural morphology and microscopic findings. In addition, published cases in Japan from 1974 through 1982 were reviewed, mainly based on the review article of Watanabe. Analysis of 71 cases of T. violaceum and T. glabrum infection revealed a distinct female preponderance with a sex ratio of 18:53. The mean age was 31.0 years of age for females and 4.4 years for males. The number of those under 12 years of age was 43 and the sex ratio of male to female was 18:25. There were 28 over 13 years of age, and all were females. These results are much the same as those on “black dot ringworm” reported by Nagata.
